It seems that zoro haters doesn't even hide in zovember sigh
To begin with Acoa it's fan made term just like adcoc that it's conquers infusion
There are two types of armament haki the basic one where we saw that even fodders can have it but in what respect to advance armament there are a lot of variants just like barrier covering emissions.... this is the Acoa whre zoro enters specially because of the fact that swordsmen are specialist in this and also we have a lot of proofs with him in this
So let's debunk this already
1.he was trained by a haki master in fact he taught him haki covering wich I already point out so check
2.barrier against the octopus in fishmen island check
3. he tamed a sword in wano that only haki masters are able to do said by a swordsmith and the dad of the former sword owner
4.he was able to cut and hurt kaido when scabbards with basic armament weren't able to do it
5.in rooftop fight he had always a purple aura in his swords so strange that when he did the pre TS it was blue and now purple
https://i.imgur.io/m8PzF9T.mp4 mmmm?
But this is just like he did when he finished pica with the daizen sekai
6.He is currently the only user that has able to turn the purple aura into fire
7.and he is always using haki in his swords